Automatic Square Bottom Paper Bag Making Machine

Automatic square bottom paper bag making machine is designed for continuous conversion of paper rolls into flat-bottom paper bags. The FDD configuration should be selected after confirming the paper type, bag size, printing requirement and finished packaging application.

The FDD automatic square bottom paper bag making machine converts plain or printed paper rolls into finished flat-bottom paper bags in one continuous process. It is suitable for kraft paper, food-grade paper and other paper rolls, producing environmentally friendly bags for snacks, bread, dried fruit and other packaging applications.

Complete Bag-Making Process

• Automatic center gluing
• Printed bag registration tracking
• Paper roll feeding and constant-tension unwinding
• Fixed-length cutting
• Bottom creasing and bottom folding
• Bottom gluing and square-bottom forming
• Finished bag collection

Core Machine Features

• French SCHNEIDER touchscreen HMI for clear and convenient operation
• German REXROTH motion controller with EtherCAT high-speed bus for stable high-speed production
• German REXROTH servo motors and German SICK photoelectric registration sensor for accurate printed-bag tracking
• Motor-driven hydraulic lifting system for paper roll loading and unloading
• Fully automatic constant-tension unwinding control
• YOUDAO web-guiding system reduces paper-roll alignment time
• Serrated cutting system

Technical Specifications

Main Control and Electrical Components

Applicable Paper Bags

The machine is designed for square-bottom and flat-bottom paper bags made from kraft paper, food-grade paper or printed paper rolls. Typical finished products include snack bags, bread bags, dried-fruit bags and other environmentally friendly paper packaging bags.

Delivery and After-Sales Support

• Estimated delivery time: approximately 60 working days after receipt of the deposit; the factory will reconfirm the delivery schedule when the order is confirmed
• Packaging: stretch-film packaging
• Quality warranty: one year
• Warranty excludes damage caused by improper operation
• After-sales service: lifetime support

Machine Selection and Order Preparation

Confirm the required bag width, cut-off length, bottom format, paper grade and whether printed-roll registration is needed before finalizing the configuration. These operating requirements determine the appropriate machine arrangement and support a clear technical discussion before manufacturing. Provide a bag drawing or sample when available so the production team can review the expected finished paper-bag format.

Packaging Application Planning

Flat-bottom paper bags are commonly selected where an upright bag shape and paper-based presentation are required. The machine is intended for the listed kraft paper, food-grade paper and other compatible paper-roll applications described on this page. Final material suitability and accessory scope should be confirmed for the buyer's own paper specification, product size and packaging workflow.

During inquiry, share the intended paper-roll condition and finished bag sample where possible. This helps confirm that the selected setup supports the buyer's documented bag-making process, handling requirements and delivery scope before the order is released.